1 .-- Variations of Lacerta muralis.] [Illustration: FIG.

2 .-- Variation of Lizards.] As the table of measurements above referred to would give no clear conception of the nature and amount of the variation without a laborious study and comparison of the figures, I have endeavoured to find a method of presenting the facts to the eye, so that they may be easily grasped and appreciated.

In the diagram opposite, the comparative variations of the different organs of this species are given by means of variously bent lines.

The head is represented by a straight line because it presented (apparently) no variation.

The body is next given, the specimens being arranged in the order of their size from No.